Heated Oxygen Sensor.
Oxygen Sensor.

• Monitors the air-to-fuel ratio within your engine
• Can become worn over time or damaged by a fluid leak
• Replacement by an INFINITI professional is recommended

Your INFINITI's combustion engine relies on a variety of sensors to preserve the environment required for proper performance. One of these technologies is the O2 or Oxygen Sensor (Rear). Originally, they were introduced to help control and curb emissions, and are now a standard offering in most current vehicles. Depending on the INFINITI model and year you own, your combustion engine may rely on one or more of these.

The Oxygen Sensor (Rear)s help gauge the air-to-fuel mixture, working with the vehicle's computer to moderate the mixture depending on whether your engine is burning rich (too little oxygen) or burning lean (too much oxygen). An “off” air-to-fuel ratio can affect your engine combustion performance, resulting in decreased gas mileage and an increase in emissions. That's why it's a good idea to have a new INFINITI O2 sensor.

An Oxygen Sensor (Rear) makes electricity, and the amount of voltage it results in depends on the product of the exhaust system. Simply put, the electricity generated by your INFINITI O2 sensor varies if the air-to-fuel ratio is off. When the system notices a change in voltage, your vehicle's onboard computer adjusts the ratio to keep it running as designed.

Your vehicle's O2 sensor may need to be replaced due to regular wear and tear. In certain circumstances, your car may need a premature O2 sensor replacement if it comes in contact with coolant or oil due to leaks or other forms of contamination. Some symptoms that may clue you into the need for a replacement O2 sensor include: engine misfires, noisy idling, decreased gas mileage, and an illuminated dashboard warning light.

Since the majority of modern cars rely on more than one Oxygen Sensor (Rear) to regulate the operation of the combustion process, it can be hard for a DIY mechanic to diagnose and replace the right sensor on their own. Occasionally, the process involves a specialized code scanner and inspecting the undercarriage by jacking up the vehicle. So many INFINITI owners opt for getting Oxygen Sensor (Rear) repairs from their local INFINITI experts.

Are you noticing common signs of Oxygen Sensor (Rear) failure? Get an authentic replacement Oxygen Sensor (Rear) for your INFINITI FX35, INFINITI FX45, INFINITI G35, INFINITI M35, or INFINITI M45. Click on the What This Fits tab for more fitment info.

Fits FX35, FX45, G35, M35, M45